Bug#823316: stk: contains non-free Steinberg ASIO library

James Cowgill jcowgill at debian.org
Tue May 3 11:27:02 UTC 2016

Source: stk
Version: 4.4.3-2
Severity: serious


stk contains a bundled copy of the Steinberg ASIO library headers in
src/include. These files are under very strict licensing terms which
can be found here (you have to download the SDK and open the PDF):

The term "Licensed Software Developer Kit" appears to cover all the

The object of this agreement consists of the Steinberg ASIO (Audio
Stream I/O) Software Development Kit version 2.3, respectively any
preview version of this Kit, comprising of documentation, example code,
and several ASIO examples. These are described hereinafter as the
"Licensed Software Developer Kit".

The license goes on to include other terms which seem to prohibit
modification or redistribution in most cases:

The Licensee has no permission to sell, license, give-away and/or
distribute the Licensed Software Developer Kit or parts of it for the
use as software developer kit in any way, for example, integrated in
any framework application, on any medium, including the Internet, to
any other person, including sub-licensors of the Licensee or companies
where the Licensee has any involvement. This includes re-working this
specification, or reverse-engineering any products based upon this

In case the Licensed Software Developer Kit is modified, it shall not
be published, sold or distributed without agreement of Steinberg.
Furthermore, the naming of the Licensed Software Developer Kit shall
not include “ASIO 2.3 SDK” or any combination containing the VST brand
without permission of Steinberg.

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